Intake and mixing device



June 7,1938. F RE"; 2,119,927

INTAKE AND MIXING DEVICE Filed Dec. 11, 1957 2 Sheets-Sheet l I I nvenior f'r'ankfieza,

,6 fiw'm Attorneys June 7, 1938. REID 2,119,927

INTAKE AND MIXING DEVICE I Filed D60. 11, 1957 2 SheetsSheet 2 Inventor 1 7 07272 flcz'd,

By 1W 5W Patented June 7, 1938 UNITED STATES PATENT OFFICE 3 Claims.

My invention relates to improvements in air intake and mixing devices for the carburetors of internal combustion engines.

The object of the invention is to provide efficient, inexpensive means of the character above indicated which may be readily incorporated with present day carburetors as vpart of the equipment thereof to automatically vary the mixture drawn from the carburetor in accordance with different operating requirements, as, for instance, in hot or cold weathenand when the engine is hot or cold, and which embodies devices for effectively breaking up particles in the mixture which have not been completely vaporized and is equipped to thoroughly filter'the auxiliary air, Y

Other objects more subordinate in naturewill appear when the succeeding description is read with reference to the drawings accompanying and forming partof this specification, it being understood that the invention resides in the detailsof construction and combinations of parts illustrated in said drawings, specifically treated in said description, and defined in the claims appended hereto.

In said drawings:. 1

Figure 1 is a fragmentary view in side elevation illustrating a preferred embodiment of the invention,

Figure 2 is a View in top plan, parts showing in section,

Figure 3 is a view in vertical transverselsection taken on the line 3-3 of Figure 2 looking in the directionindicated by the arrows,

Figure 4 is asimilar view taken on the line 44 of Figure 2 looking inthe direction of the arrows,

Figure -5 is a View in transverse section taken on the line 5-5 of Figure 4 looking downwardly, 40 and Figure 6 is a View in top plan of the fan mounting.

Referring to the drawings by numerals, in the illustrated embodiment thereof my invention has been shown as applied to a down-draft type of carburetor, the outlet or discharge conduit l thereof being shown only since the remainder of the carburetor is unimportant as regards a proper understanding of the invention. The conduit i has the usual flange 2 thereon for bolting to the corresponding flange 3 of the usual intake manifold 4 having the throttle valve 5 therein.

According to my invention an air intake and mixing unit 6 is interposed between the flanges 2 and 3, or in other words, between the carburetor and intakemanifold 4, said unit being constructed and arranged as follows:

The basic element of the unit 6 is a plate-like air jet member I fitting between said flanges '2 and 3 and having a central aperture 8 therein corresponding in sizewith the bore of the conduit I and manifold 4 and registering therewith. A pair of inlet ports l0, forming'air jets, are formed in oppositesides of the member I, respectively, said ports extending tangentially to the aperture 8 and opening thereinto in opposite directions on opposite sides thereof but in a common horizontal plane. Within the member 1 is a fan ll suspended from across bar l2, for rotation in said plane, by means of a screw bolt I3 passingthrough the hub l4 of said fan and into said bar. 'The cross bar I2 is, part of an open frame !'5 disposed on the member I and shown in-part in Figure 6. Disposed on top of the frame l5 is a similar frame I6 from the inner edge of which a plurality of pairs of opposed baffles l 'l extend into the conduit 1. The baflies l1 and. frame l6 are formed of thin metal, thebaffles with shanks I8 terminating in rounded button-like ends I9 and twisted to dispose said ends 19 in planes oblique to the horizontal,.the ends of each pair of baffles being twisted in opposite directions and located in a circular group concentricto the axis of the fan H. Below the member l'is a filter screen 25 formed of a sheet of anysuitable reticulative' material and. having its edges interposed between said member and the flange 3. The member 1, frames l5 and I6, and the filter screen 20 are clampedbe'tween the flanges 2 and 3 by means of bolts 2| and nuts 22 thereon arranged at suitable intervals around said flanges. v M v At one side of the described unit 6 is an air control unit 23 comprising a closed cylindrical container 24, of any suitable metal, suspended from-the flange 3, preferably, by means of a bracket fixed to and extending from the container 24 and clamped to the flange 3 by means of one of the aforementioned bolts 2| and nuts 22. Extending into the container 24, through the top thereof and at'the side thereof opposite to the unit 6, is a vertically disposed air intake pipe 25 spaced slightly at its lower end from the bottom of said container. Extending from the top of the container 24, at the side thereof opposite the pipe 25, is a pair of discharge pipes 26 suitably connected to the member 1 to discharge air into the aforementioned ports Ill. The container 24 is designed to contain oil to approximately the level indicated by the dotted line 21 glass sight panel 29 is suitably secured to the container 24 over a sight opening provided therein whereby the level of the oil in the container may be always ascertained.

Referring to the operation, under the suction created inthe intake manifold air is drawn into 7 the member 1, and, hence into :said manifold,

through air intake pipe 25"the oil in the con' tainer 24, discharge pipes 26, and ports In, .this auxiliary air being cleaned or filtered by its passage through the oil in thecontainer' 24. Mani festly the quantity of auxiliary air introduced into the manifold 4 is determined primarily by the speed of the engine as controlled by the throttle valve 5 so that when the engine is running at high speed, the throttle valve 5 being well open,

the quantity of air introduced is increased and the mixture from the carburetor correspondingly thinned thereby conserving fuel as will be manifest. On the other hand as the engine decelerates under, closing movement of the throttle valve 5 thequantity of auxiliary air introduced in the mannerdescribed is cut down. As the auxiliary air is drawn into the member 1 byway of the ports I!) it issues from said ports in the form of jetsdirected againstthe blades of the fan I I and causing rotation of the latter in a direction to draw or accelerate discharge'of the mixture from the conduit l. vSuch discharge of the mixture, however, is opposed by the battles H which, together with the fan ll, tends to break up particles of gasoline in the mixture which have not been completely vaporized in the carburetor mixing chamber. Such breakingjup of the mixture is further facilitated by its passage my invention will, it is believed, be clearly understood from the foregoing-without further explanation. i V H It may be stated, however, that although the invention has been shown and'described as applied to a down-draft carburetor, it may be utilized with up-draftlcar'burtors by merely reversing the position of the described unit 6.

Manifestly other modifications, than that above indicated, may be resorted towithout departing from the inventive concept and right is herein reserved to all such modifications falling within the scope of the subjoined. claims.

What I claim is: 1. The combination with a carburetor and the intake manifold of an internal combustion engine, of an auxiliary air supply and mixing unit 'in the line of connection between said carburetor and. manifold comprising a ring-like member, a

fan rotatably mounted in said member, said member having a plurality of jet forming air inlet ports therein adapted under suction created in said manifold to discharge jets of air against said fan whereby the latter is rotated, a plurality of baffle fingers extending inwardly of the member over said fan, and means for introducing auxiliary air to said ports comprising an oil con-j said manifold to discharge jets of air against said fan whereby the latter is rotated, a plurality of baffle fingers extending inwardlyof the member over said fan, and means for introducing auxiliary air to said ports comprising an oil container through which said auxiliary air is passed, and a filtering screen in said member below said fan.

3. The combination with a'carburetor and the intake manifoldpf an internal combustion lenjgine,of an auxiliary air supply and mixing unit in the line of connection between said carburetor and manifold'comprising a ring-like member, a fan rotatably mounted in said member, said member having a plurality of jet formingairin let ports therein adapted under suction created in said manifold to discharge jets of air against said fan whereby the latter is rotated, a plurality of baffle fingers extending'inwardly of the member over said fan, and means for introducing auxiliary air to said ports comprising an oil receptacle through which said auxiliary air is passed,

.an air inlet pipe extending through the topof the receptacle into the oil, conduits extending between the top of the receptacle and said ports, and a splash guard in the receptacle between the level of the'oil and said conduits.

FRANK REID. 

